The only whole number that can go into 13 and 19 evenly (their common factor) is ' 1 '.
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3 isn't a factor of either number.
Only the number 1.
1, 7, 13, 91.
It is already in its lowest form of 13/19
Barney and Friends - 1992 Ready Set Go 6-19 was released on: USA: 13 April 2000